516 INDEX

triangle inequality, 266complex numbers, 10

trichotomy, 17

uniform convergence, 258uniform convergence and continuity, 258union, 1uniqueness of limits, 276unitary, 316, 329Unitary matrix

representation, 410upper Hessenberg matrix, 435

Vandermonde determinant, 190variation of constants formula, 345variational inequality, 324vector space, 51

axioms, 78dimension, 262

vector space axioms, 51vector valued function

limit theorems, 276vectors, 53, 78volume

parallelepiped, 319

Weierstrass approximationestimate, 441

well ordered, 6well ordered sets, 504well ordering, 6Wilson’s theorem, 35Wronskian, 189, 344Wronskian alternative, 344